Abstract: A metal joiner system includes a power source and a metal joiner. The metal joiner includes a cleaning header, a cutting header, a joining header, and a joint finisher, each of which are communicatively coupled to the power source. The cutting header and cleaning header are configured to direct a first laser beam to prepare a joining region, and the joining header is configured to direct a second laser beam to form a joint in the joining region. A method of joining a metal substrates includes forming a joining region in abutting metal substrates, directing the first laser beam onto the joining region in a joint preparation stage, and directing the second laser beam onto the joining region to form a weld. A product of a metal joiner, a weld, has a portion of weld metal removed at the weld start and the weld crater regions.

Abstract: A novelty lamp, which includes a transparent or translucent container with a top surface and a bottom surface. The bottom surface of the container is mounted in a base member. Two substances are received in the container, one of which is ferro fluid. The ferro fluid has a higher relative density at room temperature and is immiscible with the other substance. Upon application of heat, which is supplied by a light bulb mounted within the base member, globules of the substance with the initially higher relative density become less dense, rise in the other substance and flow around the container. As the globules rise toward the top surface of the container they cool, become denser and drop back down toward the bottom surface of the container. Because the ferro fluid is a magnetic liquid, magnets can manipulate it, while it changes density and flows in the container.